package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 根据id查询套餐及对应的菜品信息
     * @param id
     * @return
     */
    @Override
    public SetmealVO getByIdWithDish(Long id) {
        SetmealVO vo = new SetmealVO();
        Setmeal setmeal=setmealMapper.getById(id);
        BeanUtils.copyProperties(setmeal,vo);
        List<SetmealDish> dishes=setmealDishMapper.getDishBySetmealId(id);
        vo.setSetmealDishes(dishes);

        return vo;
    }

    /**
     * 新增套餐信息
     * @param setmealDTO
     */
    @Override
    public void saveWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal=new Setmeal();

        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.save(setmeal);

        Long setmealId = setmeal.getId();

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });

        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 套餐信息分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page=setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Transactional
    @Override
    public void deleteBatch(List<Long> ids) {
        for(Long id:ids){
            Setmeal setmeal=setmealMapper.getById(id);
            if(setmeal.getStatus()== StatusConstant.ENABLE){
                throw  new DeletionNotAllowedException("当前套餐起售中");
            }
        }
        setmealMapper.deleteByIds(ids);
        setmealDishMapper.deleteBySetmealIds(ids);
    }

    /**
     * 修改套餐及套餐菜品信息
     * @param setmealDTO
     */
    @Transactional
    @Override
    public void updateWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal=new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        List<Long> setmealId=List.of(setmeal.getId());
        setmealMapper.update(setmeal);
        setmealDishMapper.deleteBySetmealIds(setmealId);
        List<SetmealDish> setmealDishes=setmealDTO.getSetmealDishes();
        setmealDishes.forEach(e->{
            e.setSetmealId(setmeal.getId());
        });
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 起售或停售套餐，当套餐关联的菜品有未起售的时，无法起售套餐
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        if(status==StatusConstant.ENABLE){
            List<Dish> dishList=dishMapper.getBySetmealId(id);
            if(dishList!=null&&dishList.size()>0){
                dishList.forEach(dish->{
                    if(StatusConstant.DISABLE==dish.getStatus()){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
        Setmeal setmeal=Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
